期刊
JOURNAL OF PLANT PHYSIOLOGY
卷 168, 期 18, 页码 2244-2250出版社
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2011.08.006
关键词
Fur; Ferric uptake regulator; Light regulated expression; Microcystin; Oxidative stress
资金
- Spanish Ministry of Education and Science
- FEDER [BFU2006-03454, PET2006-0089, BFU2009-07424]
Ferric uptake regulation (Fur) proteins are prokaryotic transcriptional regulators that integrate signaling of iron metabolism and oxidative stress responses with several environmental stresses. In photosynthetic organisms, Fur proteins regulate many genes involved in photosynthesis, nitrogen metabolism and other key processes. Also, Fur triggers the expression of virulence factors in many bacterial pathogens, and Fur from Microcystis aeruginosa has been shown to bind promoter regions of the microcystin synthesis gene cluster. In this work, we studied transcriptional responses of fur genes under different light intensities and oxidative stress. An antisense of fur, the alpha-fur RNA, plays an important role in regulating fur expression under oxidative stress, affecting levels of Fur protein in cells. Importantly, an active photosynthetic electron chain is required for the expression of the fur gene. (C) 2011 Elsevier GmbH. All rights reserved.
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